Improved file



G. B. GUBBBRLY,

NLE.

No. 78,435. Patented June 2, M68.

e. B. o-UBBERLEiLoF MILWAUKEE, 'WISCONSIN'.

Les. Patent No. 78,435, dans June 2, 1868; umana May 20,1868.

IMPROYED FILE..4

tite .Srlpmis niemh in in time ettm 4ntmt m61 mittag part si ite mit.

TO ALL WHOM ITv MAY CONCERN:

Be it known tlmtlI, G. B. CUBBERL'EY, of the-city `and county of Milwaukee, and State 'of Wisconsin, have invented a new and useful Improvement'in Files; and I do hereby declare that the following is afull, clear, and exact description thereof, which will enable thoseskilled in the art tomake and use the same, reference .being had to the accompanying drawing, forming part of this specification, in which- Figure 1 is a perspective view of lthe file, ready for use. I

Figure 2, n view with the handles and end stops removed, and the teeth in'position 'for grindingthe sides.

Figure 3, side key.

Figure 4, a view of the fiile with side key removed, ready for grinding the'edges..

Figure 5, one'oi` the end stops, which hold the teeth in position.A

Figure 6, one of the teeth.

Figure 7section of tooth, showing bevel-edges of the slot in it.. l

Similar letters of reference in eech of the figures indicate'corresponding parts.

The object of my invention is to produce a. le which can be sharpened by grinding on ncommon grindstone.V

A is the stock; B, end blocks to hold the-teethlin position;v C, side key; D, teeth; E, keys to key up blocks B; F, handles.

Operationz To grind the teeth ofthe file on the sides, remove handles F and end `blocks B; this will per mit teeth D to tip in oneA direction, as shown in fig. 2. l Then, -with s. straight piece of wood placed on the top of the teeth whchiwill keep them even, press the bottoms of the teeth 'on the grindstone, and grind them as desired; then change sides. To grindthe edges, remove side key C, when thexteeth can be'tipped or canted, as shown in g. 4; `then grindA the edges in same manner as the sides. 5

What I claim as my invention, and desire to secure bylLetters Patent, is Y Stock A, end blocks B, side key C, and teeth D, in"combiuetion, substantially as and for the purpose described.

G. B. GUBBERLEY.

Witnesses:

Cms. A. SMITH, J. B. Sm'rn. 

